Centrifugal machine



- June 16, 1925. l 1,542,747

v. VEBNEY CENTRIFUGAL MACHNE med umh 4.. 1924 Juve/Zar Patented June 16, 1925.

uNlj-T:zusra'ras fvNcENzo fvERNY, or ROME, ITALY.

CENTRIFUGL Junon-INE.

Applivcationiled' March 4,

TozaZZ whom 'it may concer-n Be itknown that 1Vr'NoENzo VERNEY, a subject, of the King of Italy, and residing at 217 kYia Emanuele Filiberto, Rome, Italy, have invented certain new" 'andv useful Improvements in Centrifugal `Machines, of which the following is afspecification.

This invention relates to centrifugal machinesadapted to separate from liquids solid substances in suspension therein. 4

f It .has for' its object to j construct a centrifugal .machine of this.V type somthat'the solid Substances Whichadhere to kthewalls of the drumafter the' separating operations, may, be stirred up and mixed with fresh liquid fed to the machine andy be'washed after the liquid from `which suchksolid substances have been A separated has l been removed or discharged from the apparatus. l

For this purpose, theinvention consists in arranging Within the centrifugal' machine a stirring device adapted to bring the solid substances previously separated from the liquid, again into suspension in fresh liquid fed to the machine, this stirring device being constructed and a-rranged so as not to interfere with the Working of the machine when it is used to separate the solid substances from the liquid.

kThe invention will be described with reference to the accompanying drawing which shows two embodimentsy of the invention, Figures 1 and Q being respectivelyl a sectional elevation and a plan view o the improved construction. i

As shown in the drawing, a case 1 has entering ita shaft 2 to which is secured a rotary drum 3. The shaft 2 is driven so that it may rotate at a high speed when the machine is used to separate the solid substances from the liquid, and at a lo-w speed when the substances that have been separated are being stirred up and washed. A shaft 4 which is arranged in parallelism with the shaft 2 enters the drum and is fitted with arms 5 carrying paddles 6. These paddles extend along the walls and the bottom of the drum 3.' The arms 5 and the paddles 6 are bent, their radius of curvature being equal to the distance between the shafts 4 and 2. The paddles 6 are arranged so that their front edge is apt to engage the wall of the drum in the direction of rotation of the drum, as will hereafter be explained. The shaft 4 rotates vin bearings 7 1924. seal' no.' cease?. i

and 7 supportedffrom the cover r of the`case 1. A hand lever 8 which by f means of ya bolt 10 may be clamped in any desired' positionon aslotted arc piece ,'9v serves to rotate ,the shaft 4 carrying they paddles 6. The liquid to! be treated. is introducedfthrough a-pipe Y11, .whereas after treatment thel clear liquid isdisch'arged through apipe y12. `This pipe 12 is screwthreaded at one end andmay be adjusted by hand-wheely 13y is connected through a rod 14 to a bearing`15 which surrounds the shaft 2, so `that thezpipe l2 willfollow the pendular movements `of"theudrum 3,`but willV not.A follow` its rotary r'r'iovements.y The drum is divided. into compartments by horizontally arranged perforated circular partitions 16 whosev outer edge is in contact 'withtthe wall:

of the drum.

When the solid substances in suspension in a liquid are to be separated therefrom the device will work as follows. The liquid containing thesolid substances is introduced into the drum through the pipe 11. The paddles occupy the position shown in Figure 2 and therefore do not project into the layer of liquid which will be formed adjacent the wall ofthe drum when same is rotating at a high speed. Owing to their curved shape the paddles do not interfere with the rotation of the drum as they cannot exert a braking action on the liquid. When the solid substances have been separated from the liquid the latter is Withdrawn by aid of the pipe 12. This operation is continued until the layer of solid substances at the wall of the drum has reached a sufficient thickness.

When the layer of solid substances has reached the desired thickness the washing liquid is introduced into the drum through the pipe 11. The drum is slowed down and the paddles 6 are brought to engage the wall of the drum through the shaft 4 being turned by means of the hand lever 8. The solid substances are thus stirred up and are made to enter the liquid so as to be in suspension therein.

When the stirring operation has been finished the paddles 6 are moved back to their original position, the drum is again made torotate at a high speed and the solid substances are thus again separated from the liquidi Of? course, thei stirring andi Washing operation'may be repeatedl i' desired, and at the end of the operations vthe solid substances are stirrled up in; fresh liquid and the muddy mass thus obtained is discharged through an opening provided in the bottom of the drum and normally closed by a cover. v

I tU is not necessary that the paddles should beQrnountedso' asfftobe able to rotate. as described, any other suitable, arrangement maybe proyided to prevent their enteringz tleulliquid, mass at the Wall ofx the drum l? duringfthe separating opera-tions, or example they may, be displaced radially or along a straightY line', along a cord ofthe periphery,l of, the drum.. K

The horizontally arranged" perforatedg parttionsdjt ,are intended to make the liquid follow the rotary, motion'`- ofthe, drum. The arms carrying the', paddles, may be. rigid' 0r elastic and" they be/ittedwith one or more paddles which. themselves; are. rigidi or. flexible 0.1'. antculatedlf Tleflorver endffof? th, Shaft' 4i whicliwill' remain; mmerge'd'in the liquidi 11111211A the, d'rllmf has.. reached, a

Certain. speed,4 is preferably: Of Oblong- Shape-0r. reiued tb, a smaller diameter in Order to., diminshithe resistance it offers; to, the liquid of' the rotating sha-ft, a seriesl ofL paddles carriedl by'the;A paddle shaft; and means forx adjust-ing'theV paddle shaft, to` arrange` the` ends of the paddlesl in ootactfwitl' orf'ree of"contact"witli the diju`1n5 saidpaddles being curved to correspond withL the curvatureoff the drum, wherebyv when, the paddles; are free ocontact with the drum no braking action is had on the*` liquid by. the paddles.l

In testimony Wlereot-Is have 'signed' my; name' at, Rome; tliisA tli day' of*1 January:

1922i!V in, t'l'leY presencel of t-Wo subscribing;

Witnesses.

VLNGENZQ Witnesses i ANGELO, CAVAFONI, Connnw- FNTANY., 

